Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.55-2.633.03-3.18
1
7.18
👆🏻
Fracture
Uneven
Uneven, Irregular, Conchoidal
Cleavage
{001} Perfect, {010} Good
{???} Indistinct
Mohs Hardness
6-6.57-7.5
2
10
👆🏻
Chemical Composition
KAlSi 3O 8Arthur Thomas , Gemstones (2009)
Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)